#!python3
# -*- coding utf-8 -*-
__authoer__ = 'pxYe'

a = 1
def external():
  global a
  a += 200
  print(a)


print(external())
print(a)


b = 100
def internal():
    # nonlocal b
    print(b)
    b = 200
    return(b)

internal()